Chemical Bonding & Periodicity
20 Questions MCQ Test GATE Chemistry Mock Test Series | Chemical Bonding & Periodicity
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The number of species having 3c-2e- bond among following is/are____
Al2(CH3)6, AI2(CH3)4CI2,(MgH2)2, AI(BH4)3, BeCI2(in solid)
Al2(CH3)6, AI2(CH3)4CI2,(MgH2)2, AI(BH4)3, BeCI2(in solid)
Species in which ligands are electron deficient (one electron) form 3c–2e– bonding.
The percentage s-character in lone pair in PH3 molecule having bond angle 92º is _____________
Hence, s-character in lone pair 100-9.6 = 90.4%
Correct order of ionization energy among following is/are
(I) N2 > N > O (II) N > O > O2 (III) N2 > O2 > NO (IV) N2 > C2 > O2
(I) N2 > N > O (II) N > O > O2 (III) N2 > O2 > NO (IV) N2 > C2 > O2
Energy required for removing electron from orbitals follows the order ABMO < A.O. < B.M.O.
As the electronegativity of substituted vP-O also increases
Energy required for removing electron from orbitals follows the order ABMO < A.O. <B.M.O.
molecule Molecular orbital diagram of 
Hence both are gerade.
Correct set of point group for BrF5, 
and [BrF6]+ respectively are-
Lesser the electronegativity of surrounding atom more s-character in that bond. Hence, more bond angle.
The maximum number of atoms that may lie in the same plane in molecule P(CH3)3(CF3)2 is _______
Number of molecule that show fluxional behavior among. CH4,CF4,PCI5,PF5,BrF5,SF6,XeO3 is _________
The number of anions having perfect Oh geometry among
[SbCI6]3-, [SeCI6]2-,[TeBr6]2-,[BrF6]-,[IF6]-,[CIF6]-,[SeF6]2- is/are__________
Lesser the difference between size of central and surrounding atom lesser will be stereochemical activity of lone pair. Hence, perfect geometry.
Molecular orbital diagram of BeH2.
Regarding following compounds A,B,C and D
Correct statement(s) is/are
More the S-character in C-O bond = more will be strength of bond. Hence, more will be vc-o value. Hence, more ionization energy and lesser the dipole moment.
The ionisation potential of hydrogen atom is 13.6 eV. The first ionisation potential of a sodium atom, assuming that the energy of its outer electron can be represented by a H-atom like model with an effective nuclear charge of 1.84, is
In salt [Et4N]2[InCI5] and [NH3(CH2)5(NH3)][TiCI5], structures of anions respectively are
These structures are due to crystal packing effect.
Select the correct statement regarding [Ph3MeP][AI(BH4)4]
(I) At 298 anion show one signal in 1H NMR
(II) At 298 anion show two signal in 1H NMR
(III) At 298 a quintet is observed in 11B NMR
(IV) At 298 a triplet of triplet is observed in 11B NMR
Structure of [AI(BH4)4]-
At 298 terminal and bridging hydrogens are involved in dynamic process. Hence, one signal in 1H NMR. 11B NMR will be a quintet regarding 4 equivalent H.
The ground state terms for H+2 and No respectively.
Hence, 2πg
Structure of X[Ph3,SiH2]
Hence, triplet
perfect trigonal prismatic geometry
perfect trigonal prismatic geometry has D3h point group.
The final dioxygen (B) undergo Diels Alder reaction unlike normal dioxygen(A). The value of spin multiplicity which represent ground state term of dioxygen (B) is __________
2s + 1 = 1, Ml =2
Hence 1Δg
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